Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbe3399f9deacfc…

MALICIOUS

PDF

111.3 KB
MD5: 29c22d128be61440e5c9726797f00b57 SHA-1: 3b25a64425b45e8ac379ba56ac5b03b2e24aacd0 SHA-256: 0dbe3399f9deacfc0b3bfbb2a4df166bf391456f1ca00a06e4852b86af6e0d7c
228 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains an XFA form and triggers the CVE-2010-0188 exploit, which is known to deliver malicious payloads. An embedded JavaScript script was extracted, which is likely responsible for executing the exploit and downloading further malicious content. The ClamAV detection of 'Pdf.Exploit.Agent-6136306-0' and 'Js.Exploit.HTML-27' further confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000238.bin
519fdd550eeb1d09090dc1ef3abe5e871e65c22b4e8e64e3323fe487e2ecba62		 pdf-embedded-script PDF raw stream script payload at offset 0x238 113273 bytes
Detection
ClamAV: Js.Exploit.HTML-27
Obfuscation or payload: unlikely

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